Massive particles coupled with 2+1 dimensional gravity and noncommutative field theory

Details Massive particles coupled with 2+1 dimensional gravity and noncommutative field theory Massive particles coupled with 2+1 dimensional gravity and noncommutative field theory

2009-02-20

arxiv.org/abs/0902.3502v3

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 3 figures; major corrections

Scientific paper

Recently, it has been shown that the effective field theory of the Ponzano-Regge model with which spinless massive particles are coupled is given by three dimensional Euclidean noncommutative scalar field theory in the Lie algebraic noncommutative space [x^i, x^j]=2i kappa epsilon^{ijk}x_k (i,j,k=1,2,3) with kappa=4 pi G, where G is a gravitational constant. We examine whether there exists the relation between spinless massive particles coupled with 2+1 dimensional Einstein gravity and the Lorentzian version of the noncommutative field theory. Then, we point out that the momentum space of the spinless massive particles in 2+1 dimensional Einstein gravity is generally different from that of the noncommutative field theory, which is given by SL(2,R)/Z_2 group space.

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